For centuries, people have searched

For centuries, people have searched for a way to replace dead and decaying teeth with comfortable false teeth. Many materials have been used to make a set of false teeth. The teeth themselves should be made from a hard and durable material. They should be secured to a soft material, making them easy to wear. In the last two decades, dentists succeeded in making durable false teeth that are comfortable, too.
Two thousand years ago, the Etruscans made teeth out of animal bone and gold. These materials were used-with varying degrees of success-up to the 1700’s. When George Washington was president, ivory from animals such as elephants became a popular material for false teeth. Doctors and inventors also tried silver, peal, and agate, but teeth made from these materials were very expensive. Perhaps the most successful material was porcelain, invented by a Frenchman about two hundred years ago. White, strong, and resistant to decay, porcelain is still used today for making single teeth.
Besides finding a material for the teeth, inventors also had to find a way to secure them in a person’s mouth. People tried wire, springs, and many kinds of glue to accomplish this. In most cases, however, discomfort and a likelihood of the teeth falling out plagued the person who wore them.
Around 1844, an American dentist named Horace Wells used laughing gas to put people to sleep before working on their teeth. This innovation made dental work a lot less painful. Soon after, an inventor created the first form of rubber. This was important to dentistry because teeth could be attached to the rubber, and the rubber could be molded to fit the shape of the mouth. With these two developments, dentist could work without causing pain and could fit teeth more carefully. False teeth have become more available and comfortable since then, and dentists have continued to improve the making and use of false teeth

Kết quả (Việt) 1:

For centuries, people have searched for a way to replace dead and decaying teeth with comfortable false teeth. Many materials have been used to make a set of false teeth. The teeth themselves should be made from a hard and durable material. They should be secured to a soft material, making them easy to wear. In the last two decades, dentists succeeded in making durable false teeth that are comfortable, too. Two thousand years ago, the Etruscans made teeth out of animal bone and gold. These materials were used-with varying degrees of success-up to the 1700’s. When George Washington was president, ivory from animals such as elephants became a popular material for false teeth. Doctors and inventors also tried silver, peal, and agate, but teeth made from these materials were very expensive. Perhaps the most successful material was porcelain, invented by a Frenchman about two hundred years ago. White, strong, and resistant to decay, porcelain is still used today for making single teeth. Besides finding a material for the teeth, inventors also had to find a way to secure them in a person’s mouth. People tried wire, springs, and many kinds of glue to accomplish this. In most cases, however, discomfort and a likelihood of the teeth falling out plagued the person who wore them. Quanh năm 1844, một nha sĩ người Mỹ tên là Horace Wells sử dụng laughing khí để đưa mọi người vào ngủ trước khi làm việc trên răng của họ. Cải tiến này đã làm việc Nha khoa rất ít đau đớn. Ngay sau đó, một nhà phát minh người tạo ra các hình thức đầu tiên của cao su. Điều này là quan trọng đối với Nha khoa vì hàm răng có thể được gắn liền với cao su và cao su có thể được đúc để phù hợp với hình dạng của miệng. Với những phát triển hai, Nha sĩ có thể làm việc mà không gây đau đớn và có thể phù hợp với răng kỹ lưỡng hơn. Răng giả đã trở thành có sẵn và thoải mái hơn kể từ đó, và bác sĩ nha khoa đã tiếp tục cải thiện việc làm và sử dụng răng giả